Although Joanne Froggatt had originally stopped by Conan on Wednesday to discuss the bittersweet final season of the popular PBS historical drama Downton Abbey, her interview ended up being a total riot when she told a story involving Kate Middleton and one very raunchy sex joke. The actress, who plays head housemaid Anna Bates, was on set with costar Michelle Dockery in March of last year when the Duchess of Cambridge popped in for a visit. Naturally, Joanne struck up a conversation with Kate, but it ended in an unintentionally dirty pun about Lady Mary's bedroom. Watch the video to see what she said, then check out what Queen Elizabeth II thinks of the hit show!
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